Fig. 515.—Dunblane Cathedral. Plan of Clerestory Window.
We now come to the most beautiful part of the structure, viz., the nave. It measures internally 129 feet in length by 57 feet in width (including the aisles), and is divided into eight bays. The four eastmost bays and the westmost bay are 10 feet in width between the piers, while the three bays next the westmost bay are 12 feet between the piers. A similar difference is observable in the upper part of the structure, which consists of the clerestory, there being no triforium ([Fig. 516]). The clerestory is constructed with an outer and an inner wall ([Fig. 515]), having a passage between them in the centre. In the outer wall are the windows, which have two lights formed by a central mullion, with plain splays on the jambs and pointed arch ([Fig. 517]). The arch head is filled with a form of tracery consisting of a quatrefoil cut in a plain circular panel, being thus an intermediate example between the perforated panel of early first pointed work and the bar tracery of the
Fig. 516.—Dunblane Cathedral. Elevation of Bay of Nave.
